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      1 // Copyright 2011 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CC_OUTPUT_GEOMETRY_BINDING_H_
      6 #define CC_OUTPUT_GEOMETRY_BINDING_H_
      7 
      8 #include "base/basictypes.h"
      9 
     10 namespace gfx { class RectF; }
     11 
     12 namespace WebKit { class WebGraphicsContext3D; }
     13 
     14 namespace cc {
     15 
     16 class GeometryBinding {
     17  public:
     18   GeometryBinding(WebKit::WebGraphicsContext3D* context,
     19                   const gfx::RectF& quad_vertex_rect);
     20   ~GeometryBinding();
     21 
     22   void PrepareForDraw();
     23 
     24   // All layer shaders share the same attribute locations for the vertex
     25   // positions and texture coordinates. This allows switching shaders without
     26   // rebinding attribute arrays.
     27   static int PositionAttribLocation() { return 0; }
     28   static int TexCoordAttribLocation() { return 1; }
     29   static int TriangleIndexAttribLocation() { return 2; }
     30 
     31  private:
     32   WebKit::WebGraphicsContext3D* context_;
     33 
     34   unsigned quad_vertices_vbo_;
     35   unsigned quad_elements_vbo_;
     36 
     37   DISALLOW_COPY_AND_ASSIGN(GeometryBinding);
     38 };
     39 
     40 }  // namespace cc
     41 
     42 #endif  // CC_OUTPUT_GEOMETRY_BINDING_H_
     43